Author Topic: car back fireing on full boost  (Read 2168 times)

03sharpe07

  • 150BHP Member
  • **
  • Posts: 24
    • View Profile
car back fireing on full boost
« on: 19:55, Wed 09 September 2009 »
i drive my car normal and it runs mint when i put my foot down it back fires with a loud bang :?  can any body tell me why

5teve L

  • Global Moderator
  • 200BHP Senior Member
  • *****
  • Posts: 3540
    • View Profile
(No subject)
« Reply #1 on: 20:03, Wed 09 September 2009 »
How much boost is it running & is the bost cut still plugged in, 2 black wires going to the short boost hose..

r5_clio

  • 170BHP Member
  • ***
  • Posts: 63
    • View Profile
(No subject)
« Reply #2 on: 20:38, Wed 09 September 2009 »
does it feel like its holding back when it backfires? if so try replacing plugs and leads because it cured that problem on mine when i wound me boost up

03sharpe07

  • 150BHP Member
  • **
  • Posts: 24
    • View Profile
(No subject)
« Reply #3 on: 21:10, Wed 09 September 2009 »
Quote from: "5teve L"
How much boost is it running & is the bost cut still plugged in, 2 black wires going to the short boost hose..

dont no i am going to rig up a boost guuge at the weekend if you are on about the sensor built it to the hose then yes it is mate  :?

03sharpe07

  • 150BHP Member
  • **
  • Posts: 24
    • View Profile
(No subject)
« Reply #4 on: 21:12, Wed 09 September 2009 »
Quote from: "r5_clio"
does it feel like its holding back when it backfires? if so try replacing plugs and leads because it cured that problem on mine when i wound me boost up

i will give it a try mate it has been sitting for about 3 years :lol:  cheers mate

red shed

  • 130BHP Member
  • *
  • Posts: 16
    • View Profile
(No subject)
« Reply #5 on: 21:37, Wed 09 September 2009 »
i had the same check for a boost leak 1st my intercooler split and it stutted under boost and then backfired its worth a try

red shed

  • 130BHP Member
  • *
  • Posts: 16
    • View Profile
(No subject)
« Reply #6 on: 21:39, Wed 09 September 2009 »
p.s or the overboost relay by the heaterfan for dirty contacts

Big Steve Raider

  • 170BHP Member
  • ***
  • Posts: 121
    • View Profile
    • http://s306.photobucket.com/albums/nn259/BigSteveT/Raider/
(No subject)
« Reply #7 on: 21:51, Wed 09 September 2009 »
Disconnect overboost switch & see if it still does it?

5teve L

  • Global Moderator
  • 200BHP Senior Member
  • *****
  • Posts: 3540
    • View Profile
(No subject)
« Reply #8 on: 22:17, Wed 09 September 2009 »
Quote from: "Big Steve Raider"
Disconnect overboost switch & see if it still does it?


What he says...

03sharpe07

  • 150BHP Member
  • **
  • Posts: 24
    • View Profile
(No subject)
« Reply #9 on: 21:32, Thu 10 September 2009 »
i willl give it ago lads appreciate the help put new pulgs and leads on it today still doing the same standard boost gauge gose off the clock ??

Ash-Lee

  • Global Moderator
  • 200BHP Senior Member
  • *****
  • Posts: 4208
    • View Profile
(No subject)
« Reply #10 on: 21:34, Thu 10 September 2009 »
Quote from: "03sharpe07"
Quote from: "5teve L"
How much boost is it running & is the bost cut still plugged in, 2 black wires going to the short boost hose..
dont no i am going to rig up a boost guuge at the weekend if you are on about the sensor built it to the hose then yes it is mate  :?


Sensible option would be return the boost to standard until you have an idea of how much boost it's running and what work has been done to the carb.

Just incase something goes bang.